body {
  position: relative;
}
main {
  background: black;
}
main .content-video {
  position: relative;
  min-width: 100%;
  height: 70%;
}
main .content-video .course-video {
  width: 100%;
  height: 300px;
  overflow: hidden;
}
main .content-video .course-video video {
  width: 100%;
  height: 100%;
}
main .content-video .course-text {
  overflow: hidden;
  padding-left: 10px;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
}
main .content-video .course-text .course-num {
  font-size: 40px;
}
main .content-video .course-text .course-name {
  margin: 10px 0;
}
footer {
  position: relative;
  width: 100%;
  height: 90px;
}
footer .last-action,
footer .suspend,
footer .next-move {
  width: 30%;
  height: 90px;
  line-height: 90px;
}
footer .fs50 {
  font-size: 30px;
}
.progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 90px;
  width: 1%;
  background: hsla(221, 96%, 52%, 0.9);
}
.meng {
  overflow: hidden;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: hsla(221, 96%, 52%, 0.9);
}
.meng .text {
  margin: 35px auto;
  width: 340px;
  height: 50px;
  color: #fff;
}
.meng .btnBox {
  margin-top: 40%;
  width: 340px;
  height: 20%;
}
.meng .btnBox .btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: aqua;
}
.meng .btnBox .btn .iconbtn {
  font-size: 40px;
}
.meng .btnBox .finish {
  background: pink;
}
.meng .stimulate-img {
  width: 340px;
  height: 120px;
  overflow: hidden;
  border-radius: 15px;
  border: 2px solid #fff;
}
.meng .stimulate-img .min-img {
  width: 170px;
  height: 120px;
  background: darkgoldenrod;
}
.meng .stimulate-img .stimulate-text {
  width: 170px;
  height: 120px;
}
.meng .stimulate-img .stimulate-text .motion-text {
  width: 170px;
  height: 30px;
  color: #ccc;
}
.meng .stimulate-img .stimulate-text .motion-name {
  width: 170px;
  height: 30px;
}
.show-meng {
  height: 100%;
}
